In the Kâte language, however, /k͡p/ is written Q q, and /ɡ͡b/ as Ɋ ɋ. Globally, these types of consonants are quite rare, only existing in two regions: West and Central Africa on the one hand, Eastern New Guinea[1] and northern Vanuatu[2] on the other.
Phonemic labial–velars occur in the majority of languages in West and Central Africa (for example in the name of Laurent Gbagbo, former president of Ivory Coast; they are found in many Niger–Congo languages as well as in the Ubangian, Chadic and Central Sudanic families), and are relatively common in the eastern end of New Guinea.
The rare implosive is only found in Lese, a Nilo-Saharan language of the Democratic Republic of the Congo.
[3][4] In Southeast Asia, they occur in the Adu dialect of Nuosu (Yi), which aside from its isolated location, is unusual in having a relatively large inventory of labial-velar consonants, including the rare aspirated version: /k͡pʰ, k͡p, ɡ͡b, ᵑɡ͡b, ŋ͡m/.
Treatments often analyze the dorsal articulation as part of the airstream mechanism, and so consider such stops to be labial.